that's a regularly occurring 6 to 20 years phenomenon be stopped? I've never heard of it. They are both a natural occurrence and a consequence of bad land management.
Madagascar is one of the most beautiful and most damaged places on the planet. Our closest living primate ancestor lives on that island probably blown there in a hurricane eons ago.. the Lemur.
It's a terrible thing when a natural phenomenon gets out of control because of human mistakes, but trying to stop a swarm of locusts conjures up many more stupid mistakes like spraying untold numbers of acres of land with insecticide.
The other thing is relating it to a plague like in biblical terms is not helpful to understanding reality. Many take it seriously and do strange and wicked things to appease some god. The locusts don't damage the earth more the humans do and unfortunately we have to look for a way to balance that Eco system not continue the same practices that are far worse than some bugs do.